_ Git - rust-lightning/blob - fuzz/src/chanmon_consistency.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 //! Test that monitor update failures don't get our channel state out of sync.
  11 //! One of the biggest concern with the monitor update failure handling code is that messages
  12 //! resent after monitor updating is restored are delivered out-of-order, resulting in
  13 //! commitment_signed messages having "invalid signatures".
  14 //! To test this we stand up a network of three nodes and read bytes from the fuzz input to denote
  15 //! actions such as sending payments, handling events, or changing monitor update return values on
  16 //! a per-node basis. This should allow it to find any cases where the ordering of actions results
  17 //! in us getting out of sync with ourselves, and, assuming at least one of our recieve- or
  18 //! send-side handling is correct, other peers. We consider it a failure if any action results in a
  19 //! channel being force-closed.
  20
  21 use bitcoin::blockdata::block::BlockHeader;
  22 use bitcoin::blockdata::transaction::{Transaction, TxOut};
  23 use bitcoin::blockdata::script::{Builder, Script};
  24 use bitcoin::blockdata::opcodes;
  25 use bitcoin::network::constants::Network;
  26
  27 use bitcoin::hashes::Hash as TraitImport;
  28 use bitcoin::hashes::sha256::Hash as Sha256;
  29 use bitcoin::hash_types::{BlockHash, WPubkeyHash};
  30
  31 use lightning::chain;
  32 use lightning::chain::chainmonitor;
  33 use lightning::chain::channelmonitor;
  34 use lightning::chain::channelmonitor::{ChannelMonitor, ChannelMonitorUpdateErr, MonitorEvent};
  35 use lightning::chain::transaction::OutPoint;
  36 use lightning::chain::chaininterface::{BroadcasterInterface, ConfirmationTarget, FeeEstimator};
  37 use lightning::chain::keysinterface::{KeysInterface, InMemoryChannelKeys};
  38 use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage, PaymentSecret, PaymentSendFailure, ChannelManagerReadArgs};
  39 use lightning::ln::features::{ChannelFeatures, InitFeatures, NodeFeatures};
  40 use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, DecodeError, ErrorAction, UpdateAddHTLC, Init};
  41 use lightning::util::enforcing_trait_impls::EnforcingChannelKeys;
  42 use lightning::util::errors::APIError;
  43 use lightning::util::events;
  44 use lightning::util::logger::Logger;
  45 use lightning::util::config::UserConfig;
  46 use lightning::util::events::{EventsProvider, MessageSendEventsProvider};
  47 use lightning::util::ser::{Readable, ReadableArgs, Writeable, Writer};
  48 use lightning::util::test_utils::OnlyReadsKeysInterface;
  49 use lightning::routing::router::{Route, RouteHop};
  50
  51
  52 use utils::test_logger;
  53 use utils::test_persister::TestPersister;
  54
  55 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  56 use bitcoin::secp256k1::Secp256k1;
  57
  58 use std::mem;
  59 use std::cmp::Ordering;
  60 use std::collections::{HashSet, hash_map, HashMap};
  61 use std::sync::{Arc,Mutex};
  62 use std::sync::atomic;
  63 use std::io::Cursor;
  64
  65 struct FuzzEstimator {}
  66 impl FeeEstimator for FuzzEstimator {
  67         fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u32 {
  68                 253
  69         }
  70 }
  71
  72 pub struct TestBroadcaster {}
  73 impl BroadcasterInterface for TestBroadcaster {
  74         fn broadcast_transaction(&self, _tx: &Transaction) { }
  75 }
  76
  77 pub struct VecWriter(pub Vec<u8>);
  78 impl Writer for VecWriter {
  79         fn write_all(&mut self, buf: &[u8]) -> Result<(), ::std::io::Error> {
  80                 self.0.extend_from_slice(buf);
  81                 Ok(())
  82         }
  83         fn size_hint(&mut self, size: usize) {
  84                 self.0.reserve_exact(size);
  85         }
  86 }
  87
  88 struct TestChainMonitor {
  89         pub logger: Arc<dyn Logger>,
  90         pub chain_monitor: Arc<chainmonitor::ChainMonitor<EnforcingChannelKeys, Arc<dyn chain::Filter>, Arc<TestBroadcaster>, Arc<FuzzEstimator>, Arc<dyn Logger>, Arc<TestPersister>>>,
  91         pub update_ret: Mutex<Result<(), channelmonitor::ChannelMonitorUpdateErr>>,
  92         // If we reload a node with an old copy of ChannelMonitors, the ChannelManager deserialization
  93         // logic will automatically force-close our channels for us (as we don't have an up-to-date
  94         // monitor implying we are not able to punish misbehaving counterparties). Because this test
  95         // "fails" if we ever force-close a channel, we avoid doing so, always saving the latest
  96         // fully-serialized monitor state here, as well as the corresponding update_id.
  97         pub latest_monitors: Mutex<HashMap<OutPoint, (u64, Vec<u8>)>>,
  98         pub should_update_manager: atomic::AtomicBool,
  99 }
 100 impl TestChainMonitor {
 101         pub fn new(broadcaster: Arc<TestBroadcaster>, logger: Arc<dyn Logger>, feeest: Arc<FuzzEstimator>, persister: Arc<TestPersister>) -> Self {
 102                 Self {
 103                         chain_monitor: Arc::new(chainmonitor::ChainMonitor::new(None, broadcaster, logger.clone(), feeest, persister)),
 104                         logger,
 105                         update_ret: Mutex::new(Ok(())),
 106                         latest_monitors: Mutex::new(HashMap::new()),
 107                         should_update_manager: atomic::AtomicBool::new(false),
 108                 }
 109         }
 110 }
 111 impl chain::Watch for TestChainMonitor {
 112         type Keys = EnforcingChannelKeys;
 113
 114         fn watch_channel(&self, funding_txo: OutPoint, monitor: channelmonitor::ChannelMonitor<EnforcingChannelKeys>) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 115                 let mut ser = VecWriter(Vec::new());
 116                 monitor.write(&mut ser).unwrap();
 117                 if let Some(_) = self.latest_monitors.lock().unwrap().insert(funding_txo, (monitor.get_latest_update_id(), ser.0)) {
 118                         panic!("Already had monitor pre-watch_channel");
 119                 }
 120                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 121                 assert!(self.chain_monitor.watch_channel(funding_txo, monitor).is_ok());
 122                 self.update_ret.lock().unwrap().clone()
 123         }
 124
 125         fn update_channel(&self, funding_txo: OutPoint, update: channelmonitor::ChannelMonitorUpdate) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
 126                 let mut map_lock = self.latest_monitors.lock().unwrap();
 127                 let mut map_entry = match map_lock.entry(funding_txo) {
 128                         hash_map::Entry::Occupied(entry) => entry,
 129                         hash_map::Entry::Vacant(_) => panic!("Didn't have monitor on update call"),
 130                 };
 131                 let mut deserialized_monitor = <(BlockHash, channelmonitor::ChannelMonitor<EnforcingChannelKeys>)>::
 132                         read(&mut Cursor::new(&map_entry.get().1), &OnlyReadsKeysInterface {}).unwrap().1;
 133                 deserialized_monitor.update_monitor(&update, &&TestBroadcaster{}, &&FuzzEstimator{}, &self.logger).unwrap();
 134                 let mut ser = VecWriter(Vec::new());
 135                 deserialized_monitor.write(&mut ser).unwrap();
 136                 map_entry.insert((update.update_id, ser.0));
 137                 self.should_update_manager.store(true, atomic::Ordering::Relaxed);
 138                 self.update_ret.lock().unwrap().clone()
 139         }
 140
 141         fn release_pending_monitor_events(&self) -> Vec<MonitorEvent> {
 142                 return self.chain_monitor.release_pending_monitor_events();
 143         }
 144 }
 145
 146 struct KeyProvider {
 147         node_id: u8,
 148         rand_bytes_id: atomic::AtomicU8,
 149 }
 150 impl KeysInterface for KeyProvider {
 151         type ChanKeySigner = EnforcingChannelKeys;
 152
 153         fn get_node_secret(&self) -> SecretKey {
 154                 SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, self.node_id]).unwrap()
 155         }
 156
 157         fn get_destination_script(&self) -> Script {
 158                 let secp_ctx = Secp256k1::signing_only();
 159                 let channel_monitor_claim_key = SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, self.node_id]).unwrap();
 160                 let our_channel_monitor_claim_key_hash = WPubkeyHash::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
 161                 Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
 162         }
 163
 164         fn get_shutdown_pubkey(&self) -> PublicKey {
 165                 let secp_ctx = Secp256k1::signing_only();
 166                 PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, self.node_id]).unwrap())
 167         }
 168
 169         fn get_channel_keys(&self, _inbound: bool, channel_value_satoshis: u64) -> EnforcingChannelKeys {
 170                 let secp_ctx = Secp256k1::signing_only();
 171                 EnforcingChannelKeys::new(InMemoryChannelKeys::new(
 172                         &secp_ctx,
 173                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, self.node_id]).unwrap(),
 174                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, self.node_id]).unwrap(),
 175                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, self.node_id]).unwrap(),
 176                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, self.node_id]).unwrap(),
 177                         SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, self.node_id]).unwrap(),
 178                         [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, self.node_id],
 179                         channel_value_satoshis,
 180                         (0, 0),
 181                 ))
 182         }
 183
 184         fn get_secure_random_bytes(&self) -> [u8; 32] {
 185                 let id = self.rand_bytes_id.fetch_add(1, atomic::Ordering::Relaxed);
 186                 [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, id, 11, self.node_id]
 187         }
 188
 189         fn read_chan_signer(&self, data: &[u8]) -> Result<EnforcingChannelKeys, DecodeError> {
 190                 EnforcingChannelKeys::read(&mut std::io::Cursor::new(data))
 191         }
 192 }
 193
 194 #[inline]
 195 fn check_api_err(api_err: APIError) {
 196         match api_err {
 197                 APIError::APIMisuseError { .. } => panic!("We can't misuse the API"),
 198                 APIError::FeeRateTooHigh { .. } => panic!("We can't send too much fee?"),
 199                 APIError::RouteError { .. } => panic!("Our routes should work"),
 200                 APIError::ChannelUnavailable { err } => {
 201                         // Test the error against a list of errors we can hit, and reject
 202                         // all others. If you hit this panic, the list of acceptable errors
 203                         // is probably just stale and you should add new messages here.
 204                         match err.as_str() {
 205                                 "Peer for first hop currently disconnected/pending monitor update!" => {},
 206                                 _ if err.starts_with("Cannot push more than their max accepted HTLCs ") => {},
 207                                 _ if err.starts_with("Cannot send value that would put us over the max HTLC value in flight our peer will accept ") => {},
 208                                 _ if err.starts_with("Cannot send value that would put our balance under counterparty-announced channel reserve value") => {},
 209                                 _ if err.starts_with("Cannot send value that would overdraw remaining funds.") => {},
 210                                 _ if err.starts_with("Cannot send value that would not leave enough to pay for fees.") => {},
 211                                 _ => panic!(err),
 212                         }
 213                 },
 214                 APIError::MonitorUpdateFailed => {
 215                         // We can (obviously) temp-fail a monitor update
 216                 },
 217         }
 218 }
 219 #[inline]
 220 fn check_payment_err(send_err: PaymentSendFailure) {
 221         match send_err {
 222                 PaymentSendFailure::ParameterError(api_err) => check_api_err(api_err),
 223                 PaymentSendFailure::PathParameterError(per_path_results) => {
 224                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 225                 },
 226                 PaymentSendFailure::AllFailedRetrySafe(per_path_results) => {
 227                         for api_err in per_path_results { check_api_err(api_err); }
 228                 },
 229                 PaymentSendFailure::PartialFailure(per_path_results) => {
 230                         for res in per_path_results { if let Err(api_err) = res { check_api_err(api_err); } }
 231                 },
 232         }
 233 }
 234
 235 type ChanMan = ChannelManager<EnforcingChannelKeys, Arc<TestChainMonitor>, Arc<TestBroadcaster>, Arc<KeyProvider>, Arc<FuzzEstimator>, Arc<dyn Logger>>;
 236
 237 #[inline]
 238 fn send_payment(source: &ChanMan, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 239         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 240         *payment_id = payment_id.wrapping_add(1);
 241         if let Err(err) = source.send_payment(&Route {
 242                 paths: vec![vec![RouteHop {
 243                         pubkey: dest.get_our_node_id(),
 244                         node_features: NodeFeatures::empty(),
 245                         short_channel_id: dest_chan_id,
 246                         channel_features: ChannelFeatures::empty(),
 247                         fee_msat: amt,
 248                         cltv_expiry_delta: 200,
 249                 }]],
 250         }, PaymentHash(payment_hash.into_inner()), &None) {
 251                 check_payment_err(err);
 252                 false
 253         } else { true }
 254 }
 255 #[inline]
 256 fn send_hop_payment(source: &ChanMan, middle: &ChanMan, middle_chan_id: u64, dest: &ChanMan, dest_chan_id: u64, amt: u64, payment_id: &mut u8) -> bool {
 257         let payment_hash = Sha256::hash(&[*payment_id; 1]);
 258         *payment_id = payment_id.wrapping_add(1);
 259         if let Err(err) = source.send_payment(&Route {
 260                 paths: vec![vec![RouteHop {
 261                         pubkey: middle.get_our_node_id(),
 262                         node_features: NodeFeatures::empty(),
 263                         short_channel_id: middle_chan_id,
 264                         channel_features: ChannelFeatures::empty(),
 265                         fee_msat: 50000,
 266                         cltv_expiry_delta: 100,
 267                 },RouteHop {
 268                         pubkey: dest.get_our_node_id(),
 269                         node_features: NodeFeatures::empty(),
 270                         short_channel_id: dest_chan_id,
 271                         channel_features: ChannelFeatures::empty(),
 272                         fee_msat: amt,
 273                         cltv_expiry_delta: 200,
 274                 }]],
 275         }, PaymentHash(payment_hash.into_inner()), &None) {
 276                 check_payment_err(err);
 277                 false
 278         } else { true }
 279 }
 280
 281 #[inline]
 282 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 283         let fee_est = Arc::new(FuzzEstimator{});
 284         let broadcast = Arc::new(TestBroadcaster{});
 285
 286         macro_rules! make_node {
 287                 ($node_id: expr) => { {
 288                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 289                         let monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 290
 291                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0) });
 292                         let mut config = UserConfig::default();
 293                         config.channel_options.fee_proportional_millionths = 0;
 294                         config.channel_options.announced_channel = true;
 295                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 296                         (ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0),
 297                         monitor)
 298                 } }
 299         }
 300
 301         macro_rules! reload_node {
 302                 ($ser: expr, $node_id: expr, $old_monitors: expr) => { {
 303                         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new($node_id.to_string(), out.clone()));
 304                         let chain_monitor = Arc::new(TestChainMonitor::new(broadcast.clone(), logger.clone(), fee_est.clone(), Arc::new(TestPersister{})));
 305
 306                         let keys_manager = Arc::new(KeyProvider { node_id: $node_id, rand_bytes_id: atomic::AtomicU8::new(0) });
 307                         let mut config = UserConfig::default();
 308                         config.channel_options.fee_proportional_millionths = 0;
 309                         config.channel_options.announced_channel = true;
 310                         config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
 311
 312                         let mut monitors = HashMap::new();
 313                         let mut old_monitors = $old_monitors.latest_monitors.lock().unwrap();
 314                         for (outpoint, (update_id, monitor_ser)) in old_monitors.drain() {
 315                                 monitors.insert(outpoint, <(BlockHash, ChannelMonitor<EnforcingChannelKeys>)>::read(&mut Cursor::new(&monitor_ser), &OnlyReadsKeysInterface {}).expect("Failed to read monitor").1);
 316                                 chain_monitor.latest_monitors.lock().unwrap().insert(outpoint, (update_id, monitor_ser));
 317                         }
 318                         let mut monitor_refs = HashMap::new();
 319                         for (outpoint, monitor) in monitors.iter_mut() {
 320                                 monitor_refs.insert(*outpoint, monitor);
 321                         }
 322
 323                         let read_args = ChannelManagerReadArgs {
 324                                 keys_manager,
 325                                 fee_estimator: fee_est.clone(),
 326                                 chain_monitor: chain_monitor.clone(),
 327                                 tx_broadcaster: broadcast.clone(),
 328                                 logger,
 329                                 default_config: config,
 330                                 channel_monitors: monitor_refs,
 331                         };
 332
 333                         (<(BlockHash, ChanMan)>::read(&mut Cursor::new(&$ser.0), read_args).expect("Failed to read manager").1, chain_monitor)
 334                 } }
 335         }
 336
 337         let mut channel_txn = Vec::new();
 338         macro_rules! make_channel {
 339                 ($source: expr, $dest: expr, $chan_id: expr) => { {
 340                         $source.create_channel($dest.get_our_node_id(), 100_000, 42, 0, None).unwrap();
 341                         let open_channel = {
 342                                 let events = $source.get_and_clear_pending_msg_events();
 343                                 assert_eq!(events.len(), 1);
 344                                 if let events::MessageSendEvent::SendOpenChannel { ref msg, .. } = events[0] {
 345                                         msg.clone()
 346                                 } else { panic!("Wrong event type"); }
 347                         };
 348
 349                         $dest.handle_open_channel(&$source.get_our_node_id(), InitFeatures::known(), &open_channel);
 350                         let accept_channel = {
 351                                 let events = $dest.get_and_clear_pending_msg_events();
 352                                 assert_eq!(events.len(), 1);
 353                                 if let events::MessageSendEvent::SendAcceptChannel { ref msg, .. } = events[0] {
 354                                         msg.clone()
 355                                 } else { panic!("Wrong event type"); }
 356                         };
 357
 358                         $source.handle_accept_channel(&$dest.get_our_node_id(), InitFeatures::known(), &accept_channel);
 359                         let funding_output;
 360                         {
 361                                 let events = $source.get_and_clear_pending_events();
 362                                 assert_eq!(events.len(), 1);
 363                                 if let events::Event::FundingGenerationReady { ref temporary_channel_id, ref channel_value_satoshis, ref output_script, .. } = events[0] {
 364                                         let tx = Transaction { version: $chan_id, lock_time: 0, input: Vec::new(), output: vec![TxOut {
 365                                                 value: *channel_value_satoshis, script_pubkey: output_script.clone(),
 366                                         }]};
 367                                         funding_output = OutPoint { txid: tx.txid(), index: 0 };
 368                                         $source.funding_transaction_generated(&temporary_channel_id, funding_output);
 369                                         channel_txn.push(tx);
 370                                 } else { panic!("Wrong event type"); }
 371                         }
 372
 373                         let funding_created = {
 374                                 let events = $source.get_and_clear_pending_msg_events();
 375                                 assert_eq!(events.len(), 1);
 376                                 if let events::MessageSendEvent::SendFundingCreated { ref msg, .. } = events[0] {
 377                                         msg.clone()
 378                                 } else { panic!("Wrong event type"); }
 379                         };
 380                         $dest.handle_funding_created(&$source.get_our_node_id(), &funding_created);
 381
 382                         let funding_signed = {
 383                                 let events = $dest.get_and_clear_pending_msg_events();
 384                                 assert_eq!(events.len(), 1);
 385                                 if let events::MessageSendEvent::SendFundingSigned { ref msg, .. } = events[0] {
 386                                         msg.clone()
 387                                 } else { panic!("Wrong event type"); }
 388                         };
 389                         $source.handle_funding_signed(&$dest.get_our_node_id(), &funding_signed);
 390
 391                         {
 392                                 let events = $source.get_and_clear_pending_events();
 393                                 assert_eq!(events.len(), 1);
 394                                 if let events::Event::FundingBroadcastSafe { .. } = events[0] {
 395                                 } else { panic!("Wrong event type"); }
 396                         }
 397                         funding_output
 398                 } }
 399         }
 400
 401         macro_rules! confirm_txn {
 402                 ($node: expr) => { {
 403                         let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 404                         let txdata: Vec<_> = channel_txn.iter().enumerate().map(|(i, tx)| (i + 1, tx)).collect();
 405                         $node.block_connected(&header, &txdata, 1);
 406                         for i in 2..100 {
 407                                 header = BlockHeader { version: 0x20000000, prev_blockhash: header.block_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
 408                                 $node.block_connected(&header, &[], i);
 409                         }
 410                 } }
 411         }
 412
 413         macro_rules! lock_fundings {
 414                 ($nodes: expr) => { {
 415                         let mut node_events = Vec::new();
 416                         for node in $nodes.iter() {
 417                                 node_events.push(node.get_and_clear_pending_msg_events());
 418                         }
 419                         for (idx, node_event) in node_events.iter().enumerate() {
 420                                 for event in node_event {
 421                                         if let events::MessageSendEvent::SendFundingLocked { ref node_id, ref msg } = event {
 422                                                 for node in $nodes.iter() {
 423                                                         if node.get_our_node_id() == *node_id {
 424                                                                 node.handle_funding_locked(&$nodes[idx].get_our_node_id(), msg);
 425                                                         }
 426                                                 }
 427                                         } else { panic!("Wrong event type"); }
 428                                 }
 429                         }
 430
 431                         for node in $nodes.iter() {
 432                                 let events = node.get_and_clear_pending_msg_events();
 433                                 for event in events {
 434                                         if let events::MessageSendEvent::SendAnnouncementSignatures { .. } = event {
 435                                         } else { panic!("Wrong event type"); }
 436                                 }
 437                         }
 438                 } }
 439         }
 440
 441         // 3 nodes is enough to hit all the possible cases, notably unknown-source-unknown-dest
 442         // forwarding.
 443         let (node_a, mut monitor_a) = make_node!(0);
 444         let (node_b, mut monitor_b) = make_node!(1);
 445         let (node_c, mut monitor_c) = make_node!(2);
 446
 447         let mut nodes = [node_a, node_b, node_c];
 448
 449         let chan_1_funding = make_channel!(nodes[0], nodes[1], 0);
 450         let chan_2_funding = make_channel!(nodes[1], nodes[2], 1);
 451
 452         for node in nodes.iter() {
 453                 confirm_txn!(node);
 454         }
 455
 456         lock_fundings!(nodes);
 457
 458         let chan_a = nodes[0].list_usable_channels()[0].short_channel_id.unwrap();
 459         let chan_b = nodes[2].list_usable_channels()[0].short_channel_id.unwrap();
 460
 461         let mut payment_id: u8 = 0;
 462
 463         let mut chan_a_disconnected = false;
 464         let mut chan_b_disconnected = false;
 465         let mut ba_events = Vec::new();
 466         let mut bc_events = Vec::new();
 467
 468         let mut node_a_ser = VecWriter(Vec::new());
 469         nodes[0].write(&mut node_a_ser).unwrap();
 470         let mut node_b_ser = VecWriter(Vec::new());
 471         nodes[1].write(&mut node_b_ser).unwrap();
 472         let mut node_c_ser = VecWriter(Vec::new());
 473         nodes[2].write(&mut node_c_ser).unwrap();
 474
 475         macro_rules! test_return {
 476                 () => { {
 477                         assert_eq!(nodes[0].list_channels().len(), 1);
 478                         assert_eq!(nodes[1].list_channels().len(), 2);
 479                         assert_eq!(nodes[2].list_channels().len(), 1);
 480                         return;
 481                 } }
 482         }
 483
 484         let mut read_pos = 0;
 485         macro_rules! get_slice {
 486                 ($len: expr) => {
 487                         {
 488                                 let slice_len = $len as usize;
 489                                 if data.len() < read_pos + slice_len {
 490                                         test_return!();
 491                                 }
 492                                 read_pos += slice_len;
 493                                 &data[read_pos - slice_len..read_pos]
 494                         }
 495                 }
 496         }
 497
 498         loop {
 499                 macro_rules! send_payment_with_secret {
 500                         ($source: expr, $middle: expr, $dest: expr) => { {
 501                                 let payment_hash = Sha256::hash(&[payment_id; 1]);
 502                                 payment_id = payment_id.wrapping_add(1);
 503                                 let payment_secret = Sha256::hash(&[payment_id; 1]);
 504                                 payment_id = payment_id.wrapping_add(1);
 505                                 if let Err(err) = $source.send_payment(&Route {
 506                                         paths: vec![vec![RouteHop {
 507                                                 pubkey: $middle.0.get_our_node_id(),
 508                                                 node_features: NodeFeatures::empty(),
 509                                                 short_channel_id: $middle.1,
 510                                                 channel_features: ChannelFeatures::empty(),
 511                                                 fee_msat: 50_000,
 512                                                 cltv_expiry_delta: 100,
 513                                         },RouteHop {
 514                                                 pubkey: $dest.0.get_our_node_id(),
 515                                                 node_features: NodeFeatures::empty(),
 516                                                 short_channel_id: $dest.1,
 517                                                 channel_features: ChannelFeatures::empty(),
 518                                                 fee_msat: 10_000_000,
 519                                                 cltv_expiry_delta: 200,
 520                                         }],vec![RouteHop {
 521                                                 pubkey: $middle.0.get_our_node_id(),
 522                                                 node_features: NodeFeatures::empty(),
 523                                                 short_channel_id: $middle.1,
 524                                                 channel_features: ChannelFeatures::empty(),
 525                                                 fee_msat: 50_000,
 526                                                 cltv_expiry_delta: 100,
 527                                         },RouteHop {
 528                                                 pubkey: $dest.0.get_our_node_id(),
 529                                                 node_features: NodeFeatures::empty(),
 530                                                 short_channel_id: $dest.1,
 531                                                 channel_features: ChannelFeatures::empty(),
 532                                                 fee_msat: 10_000_000,
 533                                                 cltv_expiry_delta: 200,
 534                                         }]],
 535                                 }, PaymentHash(payment_hash.into_inner()), &Some(PaymentSecret(payment_secret.into_inner()))) {
 536                                         check_payment_err(err);
 537                                 }
 538                         } }
 539                 }
 540
 541                 macro_rules! process_msg_events {
 542                         ($node: expr, $corrupt_forward: expr) => { {
 543                                 let events = if $node == 1 {
 544                                         let mut new_events = Vec::new();
 545                                         mem::swap(&mut new_events, &mut ba_events);
 546                                         new_events.extend_from_slice(&bc_events[..]);
 547                                         bc_events.clear();
 548                                         new_events
 549                                 } else { Vec::new() };
 550                                 let mut had_events = false;
 551                                 for event in events.iter().chain(nodes[$node].get_and_clear_pending_msg_events().iter()) {
 552                                         had_events = true;
 553                                         match event {
 554                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, updates: CommitmentUpdate { ref update_add_htlcs, ref update_fail_htlcs, ref update_fulfill_htlcs, ref update_fail_malformed_htlcs, ref update_fee, ref commitment_signed } } => {
 555                                                         for dest in nodes.iter() {
 556                                                                 if dest.get_our_node_id() == *node_id {
 557                                                                         assert!(update_fee.is_none());
 558                                                                         for update_add in update_add_htlcs {
 559                                                                                 if !$corrupt_forward {
 560                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &update_add);
 561                                                                                 } else {
 562                                                                                         // Corrupt the update_add_htlc message so that its HMAC
 563                                                                                         // check will fail and we generate a
 564                                                                                         // update_fail_malformed_htlc instead of an
 565                                                                                         // update_fail_htlc as we do when we reject a payment.
 566                                                                                         let mut msg_ser = update_add.encode();
 567                                                                                         msg_ser[1000] ^= 0xff;
 568                                                                                         let new_msg = UpdateAddHTLC::read(&mut Cursor::new(&msg_ser)).unwrap();
 569                                                                                         dest.handle_update_add_htlc(&nodes[$node].get_our_node_id(), &new_msg);
 570                                                                                 }
 571                                                                         }
 572                                                                         for update_fulfill in update_fulfill_htlcs {
 573                                                                                 dest.handle_update_fulfill_htlc(&nodes[$node].get_our_node_id(), &update_fulfill);
 574                                                                         }
 575                                                                         for update_fail in update_fail_htlcs {
 576                                                                                 dest.handle_update_fail_htlc(&nodes[$node].get_our_node_id(), &update_fail);
 577                                                                         }
 578                                                                         for update_fail_malformed in update_fail_malformed_htlcs {
 579                                                                                 dest.handle_update_fail_malformed_htlc(&nodes[$node].get_our_node_id(), &update_fail_malformed);
 580                                                                         }
 581                                                                         dest.handle_commitment_signed(&nodes[$node].get_our_node_id(), &commitment_signed);
 582                                                                 }
 583                                                         }
 584                                                 },
 585                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, ref msg } => {
 586                                                         for dest in nodes.iter() {
 587                                                                 if dest.get_our_node_id() == *node_id {
 588                                                                         dest.handle_revoke_and_ack(&nodes[$node].get_our_node_id(), msg);
 589                                                                 }
 590                                                         }
 591                                                 },
 592                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, ref msg } => {
 593                                                         for dest in nodes.iter() {
 594                                                                 if dest.get_our_node_id() == *node_id {
 595                                                                         dest.handle_channel_reestablish(&nodes[$node].get_our_node_id(), msg);
 596                                                                 }
 597                                                         }
 598                                                 },
 599                                                 events::MessageSendEvent::SendFundingLocked { .. } => {
 600                                                         // Can be generated as a reestablish response
 601                                                 },
 602                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {
 603                                                         // Can be generated due to a payment forward being rejected due to a
 604                                                         // channel having previously failed a monitor update
 605                                                 },
 606                                                 _ => panic!("Unhandled message event"),
 607                                         }
 608                                 }
 609                                 had_events
 610                         } }
 611                 }
 612
 613                 macro_rules! drain_msg_events_on_disconnect {
 614                         ($counterparty_id: expr) => { {
 615                                 if $counterparty_id == 0 {
 616                                         for event in nodes[0].get_and_clear_pending_msg_events() {
 617                                                 match event {
 618                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 619                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 620                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 621                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 622                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 623                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 624                                                         _ => panic!("Unhandled message event"),
 625                                                 }
 626                                         }
 627                                         ba_events.clear();
 628                                 } else {
 629                                         for event in nodes[2].get_and_clear_pending_msg_events() {
 630                                                 match event {
 631                                                         events::MessageSendEvent::UpdateHTLCs { .. } => {},
 632                                                         events::MessageSendEvent::SendRevokeAndACK { .. } => {},
 633                                                         events::MessageSendEvent::SendChannelReestablish { .. } => {},
 634                                                         events::MessageSendEvent::SendFundingLocked { .. } => {},
 635                                                         events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => {},
 636                                                         events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => {},
 637                                                         _ => panic!("Unhandled message event"),
 638                                                 }
 639                                         }
 640                                         bc_events.clear();
 641                                 }
 642                                 let mut events = nodes[1].get_and_clear_pending_msg_events();
 643                                 let drop_node_id = if $counterparty_id == 0 { nodes[0].get_our_node_id() } else { nodes[2].get_our_node_id() };
 644                                 let msg_sink = if $counterparty_id == 0 { &mut bc_events } else { &mut ba_events };
 645                                 for event in events.drain(..) {
 646                                         let push = match event {
 647                                                 events::MessageSendEvent::UpdateHTLCs { ref node_id, .. } => {
 648                                                         if *node_id != drop_node_id { true } else { false }
 649                                                 },
 650                                                 events::MessageSendEvent::SendRevokeAndACK { ref node_id, .. } => {
 651                                                         if *node_id != drop_node_id { true } else { false }
 652                                                 },
 653                                                 events::MessageSendEvent::SendChannelReestablish { ref node_id, .. } => {
 654                                                         if *node_id != drop_node_id { true } else { false }
 655                                                 },
 656                                                 events::MessageSendEvent::SendFundingLocked { .. } => false,
 657                                                 events::MessageSendEvent::PaymentFailureNetworkUpdate { .. } => false,
 658                                                 events::MessageSendEvent::HandleError { action: ErrorAction::IgnoreError, .. } => false,
 659                                                 _ => panic!("Unhandled message event"),
 660                                         };
 661                                         if push { msg_sink.push(event); }
 662                                 }
 663                         } }
 664                 }
 665
 666                 macro_rules! process_events {
 667                         ($node: expr, $fail: expr) => { {
 668                                 // In case we get 256 payments we may have a hash collision, resulting in the
 669                                 // second claim/fail call not finding the duplicate-hash HTLC, so we have to
 670                                 // deduplicate the calls here.
 671                                 let mut claim_set = HashSet::new();
 672                                 let mut events = nodes[$node].get_and_clear_pending_events();
 673                                 // Sort events so that PendingHTLCsForwardable get processed last. This avoids a
 674                                 // case where we first process a PendingHTLCsForwardable, then claim/fail on a
 675                                 // PaymentReceived, claiming/failing two HTLCs, but leaving a just-generated
 676                                 // PaymentReceived event for the second HTLC in our pending_events (and breaking
 677                                 // our claim_set deduplication).
 678                                 events.sort_by(|a, b| {
 679                                         if let events::Event::PaymentReceived { .. } = a {
 680                                                 if let events::Event::PendingHTLCsForwardable { .. } = b {
 681                                                         Ordering::Less
 682                                                 } else { Ordering::Equal }
 683                                         } else if let events::Event::PendingHTLCsForwardable { .. } = a {
 684                                                 if let events::Event::PaymentReceived { .. } = b {
 685                                                         Ordering::Greater
 686                                                 } else { Ordering::Equal }
 687                                         } else { Ordering::Equal }
 688                                 });
 689                                 let had_events = !events.is_empty();
 690                                 for event in events.drain(..) {
 691                                         match event {
 692                                                 events::Event::PaymentReceived { payment_hash, payment_secret, amt } => {
 693                                                         if claim_set.insert(payment_hash.0) {
 694                                                                 if $fail {
 695                                                                         assert!(nodes[$node].fail_htlc_backwards(&payment_hash, &payment_secret));
 696                                                                 } else {
 697                                                                         assert!(nodes[$node].claim_funds(PaymentPreimage(payment_hash.0), &payment_secret, amt));
 698                                                                 }
 699                                                         }
 700                                                 },
 701                                                 events::Event::PaymentSent { .. } => {},
 702                                                 events::Event::PaymentFailed { .. } => {},
 703                                                 events::Event::PendingHTLCsForwardable { .. } => {
 704                                                         nodes[$node].process_pending_htlc_forwards();
 705                                                 },
 706                                                 _ => panic!("Unhandled event"),
 707                                         }
 708                                 }
 709                                 had_events
 710                         } }
 711                 }
 712
 713                 match get_slice!(1)[0] {
 714                         // In general, we keep related message groups close together in binary form, allowing
 715                         // bit-twiddling mutations to have similar effects. This is probably overkill, but no
 716                         // harm in doing so.
 717
 718                         0x00 => *monitor_a.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 719                         0x01 => *monitor_b.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 720                         0x02 => *monitor_c.update_ret.lock().unwrap() = Err(ChannelMonitorUpdateErr::TemporaryFailure),
 721                         0x04 => *monitor_a.update_ret.lock().unwrap() = Ok(()),
 722                         0x05 => *monitor_b.update_ret.lock().unwrap() = Ok(()),
 723                         0x06 => *monitor_c.update_ret.lock().unwrap() = Ok(()),
 724
 725                         0x08 => {
 726                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 727                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 728                                 }
 729                         },
 730                         0x09 => {
 731                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 732                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 733                                 }
 734                         },
 735                         0x0a => {
 736                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 737                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 738                                 }
 739                         },
 740                         0x0b => {
 741                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 742                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 743                                 }
 744                         },
 745
 746                         0x0c => {
 747                                 if !chan_a_disconnected {
 748                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 749                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 750                                         chan_a_disconnected = true;
 751                                         drain_msg_events_on_disconnect!(0);
 752                                 }
 753                         },
 754                         0x0d => {
 755                                 if !chan_b_disconnected {
 756                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 757                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 758                                         chan_b_disconnected = true;
 759                                         drain_msg_events_on_disconnect!(2);
 760                                 }
 761                         },
 762                         0x0e => {
 763                                 if chan_a_disconnected {
 764                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 765                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 766                                         chan_a_disconnected = false;
 767                                 }
 768                         },
 769                         0x0f => {
 770                                 if chan_b_disconnected {
 771                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 772                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 773                                         chan_b_disconnected = false;
 774                                 }
 775                         },
 776
 777                         0x10 => { process_msg_events!(0, true); },
 778                         0x11 => { process_msg_events!(0, false); },
 779                         0x12 => { process_events!(0, true); },
 780                         0x13 => { process_events!(0, false); },
 781                         0x14 => { process_msg_events!(1, true); },
 782                         0x15 => { process_msg_events!(1, false); },
 783                         0x16 => { process_events!(1, true); },
 784                         0x17 => { process_events!(1, false); },
 785                         0x18 => { process_msg_events!(2, true); },
 786                         0x19 => { process_msg_events!(2, false); },
 787                         0x1a => { process_events!(2, true); },
 788                         0x1b => { process_events!(2, false); },
 789
 790                         0x1c => {
 791                                 if !chan_a_disconnected {
 792                                         nodes[1].peer_disconnected(&nodes[0].get_our_node_id(), false);
 793                                         chan_a_disconnected = true;
 794                                         drain_msg_events_on_disconnect!(0);
 795                                 }
 796                                 let (new_node_a, new_monitor_a) = reload_node!(node_a_ser, 0, monitor_a);
 797                                 nodes[0] = new_node_a;
 798                                 monitor_a = new_monitor_a;
 799                         },
 800                         0x1d => {
 801                                 if !chan_a_disconnected {
 802                                         nodes[0].peer_disconnected(&nodes[1].get_our_node_id(), false);
 803                                         chan_a_disconnected = true;
 804                                         nodes[0].get_and_clear_pending_msg_events();
 805                                         ba_events.clear();
 806                                 }
 807                                 if !chan_b_disconnected {
 808                                         nodes[2].peer_disconnected(&nodes[1].get_our_node_id(), false);
 809                                         chan_b_disconnected = true;
 810                                         nodes[2].get_and_clear_pending_msg_events();
 811                                         bc_events.clear();
 812                                 }
 813                                 let (new_node_b, new_monitor_b) = reload_node!(node_b_ser, 1, monitor_b);
 814                                 nodes[1] = new_node_b;
 815                                 monitor_b = new_monitor_b;
 816                         },
 817                         0x1e => {
 818                                 if !chan_b_disconnected {
 819                                         nodes[1].peer_disconnected(&nodes[2].get_our_node_id(), false);
 820                                         chan_b_disconnected = true;
 821                                         drain_msg_events_on_disconnect!(2);
 822                                 }
 823                                 let (new_node_c, new_monitor_c) = reload_node!(node_c_ser, 2, monitor_c);
 824                                 nodes[2] = new_node_c;
 825                                 monitor_c = new_monitor_c;
 826                         },
 827
 828                         // 1/10th the channel size:
 829                         0x20 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id); },
 830                         0x21 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 831                         0x22 => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 832                         0x23 => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id); },
 833                         0x24 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000_000, &mut payment_id); },
 834                         0x25 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000_000, &mut payment_id); },
 835
 836                         0x26 => { send_payment_with_secret!(nodes[0], (&nodes[1], chan_a), (&nodes[2], chan_b)); },
 837                         0x27 => { send_payment_with_secret!(nodes[2], (&nodes[1], chan_b), (&nodes[0], chan_a)); },
 838
 839                         0x28 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000_000, &mut payment_id); },
 840                         0x29 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 841                         0x2a => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 842                         0x2b => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000_000, &mut payment_id); },
 843                         0x2c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000_000, &mut payment_id); },
 844                         0x2d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000_000, &mut payment_id); },
 845
 846                         0x30 => { send_payment(&nodes[0], &nodes[1], chan_a, 100_000, &mut payment_id); },
 847                         0x31 => { send_payment(&nodes[1], &nodes[0], chan_a, 100_000, &mut payment_id); },
 848                         0x32 => { send_payment(&nodes[1], &nodes[2], chan_b, 100_000, &mut payment_id); },
 849                         0x33 => { send_payment(&nodes[2], &nodes[1], chan_b, 100_000, &mut payment_id); },
 850                         0x34 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100_000, &mut payment_id); },
 851                         0x35 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100_000, &mut payment_id); },
 852
 853                         0x38 => { send_payment(&nodes[0], &nodes[1], chan_a, 10_000, &mut payment_id); },
 854                         0x39 => { send_payment(&nodes[1], &nodes[0], chan_a, 10_000, &mut payment_id); },
 855                         0x3a => { send_payment(&nodes[1], &nodes[2], chan_b, 10_000, &mut payment_id); },
 856                         0x3b => { send_payment(&nodes[2], &nodes[1], chan_b, 10_000, &mut payment_id); },
 857                         0x3c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10_000, &mut payment_id); },
 858                         0x3d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10_000, &mut payment_id); },
 859
 860                         0x40 => { send_payment(&nodes[0], &nodes[1], chan_a, 1_000, &mut payment_id); },
 861                         0x41 => { send_payment(&nodes[1], &nodes[0], chan_a, 1_000, &mut payment_id); },
 862                         0x42 => { send_payment(&nodes[1], &nodes[2], chan_b, 1_000, &mut payment_id); },
 863                         0x43 => { send_payment(&nodes[2], &nodes[1], chan_b, 1_000, &mut payment_id); },
 864                         0x44 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1_000, &mut payment_id); },
 865                         0x45 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1_000, &mut payment_id); },
 866
 867                         0x48 => { send_payment(&nodes[0], &nodes[1], chan_a, 100, &mut payment_id); },
 868                         0x49 => { send_payment(&nodes[1], &nodes[0], chan_a, 100, &mut payment_id); },
 869                         0x4a => { send_payment(&nodes[1], &nodes[2], chan_b, 100, &mut payment_id); },
 870                         0x4b => { send_payment(&nodes[2], &nodes[1], chan_b, 100, &mut payment_id); },
 871                         0x4c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 100, &mut payment_id); },
 872                         0x4d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 100, &mut payment_id); },
 873
 874                         0x50 => { send_payment(&nodes[0], &nodes[1], chan_a, 10, &mut payment_id); },
 875                         0x51 => { send_payment(&nodes[1], &nodes[0], chan_a, 10, &mut payment_id); },
 876                         0x52 => { send_payment(&nodes[1], &nodes[2], chan_b, 10, &mut payment_id); },
 877                         0x53 => { send_payment(&nodes[2], &nodes[1], chan_b, 10, &mut payment_id); },
 878                         0x54 => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 10, &mut payment_id); },
 879                         0x55 => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 10, &mut payment_id); },
 880
 881                         0x58 => { send_payment(&nodes[0], &nodes[1], chan_a, 1, &mut payment_id); },
 882                         0x59 => { send_payment(&nodes[1], &nodes[0], chan_a, 1, &mut payment_id); },
 883                         0x5a => { send_payment(&nodes[1], &nodes[2], chan_b, 1, &mut payment_id); },
 884                         0x5b => { send_payment(&nodes[2], &nodes[1], chan_b, 1, &mut payment_id); },
 885                         0x5c => { send_hop_payment(&nodes[0], &nodes[1], chan_a, &nodes[2], chan_b, 1, &mut payment_id); },
 886                         0x5d => { send_hop_payment(&nodes[2], &nodes[1], chan_b, &nodes[0], chan_a, 1, &mut payment_id); },
 887
 888                         0xff => {
 889                                 // Test that no channel is in a stuck state where neither party can send funds even
 890                                 // after we resolve all pending events.
 891                                 // First make sure there are no pending monitor updates, resetting the error state
 892                                 // and calling channel_monitor_updated for each monitor.
 893                                 *monitor_a.update_ret.lock().unwrap() = Ok(());
 894                                 *monitor_b.update_ret.lock().unwrap() = Ok(());
 895                                 *monitor_c.update_ret.lock().unwrap() = Ok(());
 896
 897                                 if let Some((id, _)) = monitor_a.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 898                                         nodes[0].channel_monitor_updated(&chan_1_funding, *id);
 899                                 }
 900                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_1_funding) {
 901                                         nodes[1].channel_monitor_updated(&chan_1_funding, *id);
 902                                 }
 903                                 if let Some((id, _)) = monitor_b.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 904                                         nodes[1].channel_monitor_updated(&chan_2_funding, *id);
 905                                 }
 906                                 if let Some((id, _)) = monitor_c.latest_monitors.lock().unwrap().get(&chan_2_funding) {
 907                                         nodes[2].channel_monitor_updated(&chan_2_funding, *id);
 908                                 }
 909
 910                                 // Next, make sure peers are all connected to each other
 911                                 if chan_a_disconnected {
 912                                         nodes[0].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 913                                         nodes[1].peer_connected(&nodes[0].get_our_node_id(), &Init { features: InitFeatures::empty() });
 914                                         chan_a_disconnected = false;
 915                                 }
 916                                 if chan_b_disconnected {
 917                                         nodes[1].peer_connected(&nodes[2].get_our_node_id(), &Init { features: InitFeatures::empty() });
 918                                         nodes[2].peer_connected(&nodes[1].get_our_node_id(), &Init { features: InitFeatures::empty() });
 919                                         chan_b_disconnected = false;
 920                                 }
 921
 922                                 for i in 0..std::usize::MAX {
 923                                         if i == 100 { panic!("It may take may iterations to settle the state, but it should not take forever"); }
 924                                         // Then, make sure any current forwards make their way to their destination
 925                                         if process_msg_events!(0, false) { continue; }
 926                                         if process_msg_events!(1, false) { continue; }
 927                                         if process_msg_events!(2, false) { continue; }
 928                                         // ...making sure any pending PendingHTLCsForwardable events are handled and
 929                                         // payments claimed.
 930                                         if process_events!(0, false) { continue; }
 931                                         if process_events!(1, false) { continue; }
 932                                         if process_events!(2, false) { continue; }
 933                                         break;
 934                                 }
 935
 936                                 // Finally, make sure that at least one end of each channel can make a substantial payment.
 937                                 assert!(
 938                                         send_payment(&nodes[0], &nodes[1], chan_a, 10_000_000, &mut payment_id) ||
 939                                         send_payment(&nodes[1], &nodes[0], chan_a, 10_000_000, &mut payment_id));
 940                                 assert!(
 941                                         send_payment(&nodes[1], &nodes[2], chan_b, 10_000_000, &mut payment_id) ||
 942                                         send_payment(&nodes[2], &nodes[1], chan_b, 10_000_000, &mut payment_id));
 943                         },
 944                         _ => test_return!(),
 945                 }
 946
 947                 node_a_ser.0.clear();
 948                 nodes[0].write(&mut node_a_ser).unwrap();
 949                 monitor_a.should_update_manager.store(false, atomic::Ordering::Relaxed);
 950                 node_b_ser.0.clear();
 951                 nodes[1].write(&mut node_b_ser).unwrap();
 952                 monitor_b.should_update_manager.store(false, atomic::Ordering::Relaxed);
 953                 node_c_ser.0.clear();
 954                 nodes[2].write(&mut node_c_ser).unwrap();
 955                 monitor_c.should_update_manager.store(false, atomic::Ordering::Relaxed);
 956         }
 957 }
 958
 959 pub fn chanmon_consistency_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 960         do_test(data, out);
 961 }
 962
 963 #[no_mangle]
 964 pub extern "C" fn chanmon_consistency_run(data: *const u8, datalen: usize) {
 965         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull{});
 966 }